CN104604144A - Transceiver front-end - Google Patents
Transceiver front-end Download PDFInfo
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- CN104604144A CN104604144A CN201280075698.2A CN201280075698A CN104604144A CN 104604144 A CN104604144 A CN 104604144A CN 201280075698 A CN201280075698 A CN 201280075698A CN 104604144 A CN104604144 A CN 104604144A
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- node
- filter apparatus
- transformer
- blocking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5491—Systems for power line communications using filtering and bypassing
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Bidirectional Digital Transmission (AREA)
Abstract
A transceiver front-end of a communication device is disclosed. The transceiver front-end is connectable to a signal transmission and reception arrangement adapted to transmit a transmit signal having a transmit frequency and to receive a receive signal having a receive frequency, to a transmitter adapted to produce the transmit signal, and to a receiver adapted to process the receive signal. The transceiver front-end comprises a transmit frequency blocking arrangement and a receive frequency blocking arrangement. The transmit frequency blocking arrangement has a blocking frequency interval associated with the transmit frequency and a non-blocking frequency interval associated with the receive frequency, and is adapted to block passage of transmit frequency signals between the signal transmission and reception arrangement and the receiver The receive frequency blocking arrangement has a blocking frequency interval associated with the receive frequency and a non-blocking frequency interval associated with the transmit frequency, and is adapted to block passage of receive frequency signals between the signal transmission and reception arrangement and the transmitter. The transmit frequency blocking arrangement comprises a network of passive components comprising at least one transformer and a first filter arrangement adapted to have a higher impedance value at the transmit frequency than at the receive frequency. The receive frequency blocking arrangement comprises a second filter arrangement adapted to have a higher impedance value at the transmit frequency than at the receive frequency and a third filter arrangement adapted to have a higher impedance value at the receive frequency than at the transmit frequency.
Description
Technical field
In general, the present invention relates to the field of the transceiver front-end of communication equipment.More particularly, the present invention relates to the transceiver front-end for providing isolation between conveyer and transceiver.
Background technology
In the transceiver communicated for Frequency Division Duplexing (FDD) (FDD) (such as, the transceiver of cellular radio device), receiver can experience the high reject signal of the conveyer from identical transceiver usually.
Interference signal from conveyer has carrier frequency at the duplex distance place of the carrier frequency of distance Received signal strength.Typical duplex distance is less than carrier frequency.Usually, duplex distance may be less than 100 MHz, and carrier frequency can be certain value such as between 700 MHz and 3 GHz.
In order to can with desired properties (such as, reach excellent sensitivity) operate, preferably should shield (or isolation) receiver with the interference of the conveyer from transceiver, that is, the interference of the receive frequency generated from interference and the conveyer of the transmitter signals of transmitted frequency.Also wish that shielding (or isolation) conveyer is to disturb from Received signal strength.Example reason comprises: in order to reach optimum receiver performance, received energy as much as possible should be delivered to receiver; And interference may be caused to by the signal of transmission at the Received signal strength of conveyer output appearance.
This isolation is normally realized by the outer sound wave duplexer filter (duplexer) of chip.A shortcoming of duplexer is that they usually costly.They are also very huge, can increase the size that transceiver realizes thus.The frequency of duplexer is also fixing, if will support several frequency band, so just must use several duplexer.The increase of the number of frequency bands will supported along with communication equipment, these problems are just becoming more and more outstanding.
Therefore, the integrated form solution that isolation is provided between conveyer and receiver is needed.
On typical chip, isolation realizes the elimination based on interference source signal.In order to the perfection realizing the transmission signal of receiver input is eliminated, symmetry is required, and circuit needs the dummy load of the antenna impedance for balanced reception frequency and transmitted frequency.If antenna impedance is plural number (inductive or capacitive character) and/or changes in time (such as, the antenna environment due to frequency change and/or change), the so perfect realization eliminated becomes pretty troublesome.In addition, at least 3 dB power of reception and transmission signal will be lost in dummy load.
US 2011/0064004 A1 discloses a kind of radio frequency (RF) front end, and it comprises power amplifier (PA), noise matching low noise amplifier (LNA), balancing network and four port isolation modules.Isolation module by the 3rd port and the 4th port isolation to prevent the strong exit signal received in the 3rd port from making the LNA being coupled to the 4th port saturated.Isolation realizes via electric equilibrium.
With mentioned above similar, a shortcoming of this solution is, balancing network needs impedance variation in tracking antenna in operation to make it possible to abundant isolation.Need the impedance simultaneously following the tracks of receive frequency and transmitted frequency.Therefore, this realization is sensitive and complexity.Another shortcoming of this solution is, due to the matched impedance of balancing network, will lose at least 3 dB power of reception and transmission signal.
Therefore, need between conveyer and receiver, provide the alternative of isolation and improve integrated form solution.
Summary of the invention
Should emphasize, being considered as when term " comprises " use is in this manual the existence of specifying feature, entirety, step or the assembly of stating, but does not get rid of existence or increase one or more further feature, entirety, step, assembly or its group.
The object of some embodiments is the integrated form solutions eliminated above at least some shortcoming and be provided in the improvement providing isolation between conveyer and receiver.
According to first aspect, this is realized by the transceiver front-end of communication equipment.Communication equipment can be wireless or wire communication facility.
According to first aspect, transceiver front-end can to transmit and receiving system Nodes is connected to and is suitable for transmitting signal transmission and the receiving system that the transmission signal with transmitted frequency and reception have the Received signal strength of receive frequency at signal.Signal transmits and the example of receiving system comprises antenna, the group of antenna and cable.
Transceiver front-end also can be connected at one or more conveyer Nodes the conveyer being suitable for producing transmission signal, and can be connected to the receiver being suitable for processing Received signal strength at one or more receiver node place.
Transceiver front-end comprises and is connected to signal and transmits and the transmitted frequency blocking device of at least one receiver node in receiving system node and receiver node.The blocking frequency interval that transmitted frequency blocking device has and transmitted frequency is associated and the unblock frequency interval be associated with receive frequency, and be suitable for blocking transmit frequency signal signal transmission and passing through between receiving system and receiver.Transmitted frequency can be included in blocking frequency interval, and receive frequency can be included in unblock frequency interval.
Transceiver front-end also comprises and is connected to signal and transmits and the receive frequency blocking device of at least one conveyer node in receiving system node and conveyer node.The blocking frequency interval that receive frequency blocking device has and receive frequency is associated and the unblock frequency interval be associated with transmitted frequency, and be suitable for barrage reception frequency signal signal transmission and passing through between receiving system and conveyer.Receive frequency can be included in blocking frequency interval, and transmitted frequency can be included in unblock frequency interval.
Therefore, conveyer can be connected to signal via receive frequency blocking device and transmit and receiving system node, and receiver can be connected to signal transmission and receiving system node via transmitted frequency blocking device.
Transmitted frequency blocking device comprises network and first filter apparatus of the passive block comprising at least one transformer, and the first filter apparatus is suitable for having than at the higher resistance value of receive frequency at transmitted frequency.
Receive frequency blocking device comprises and is suitable for having at transmitted frequency having than the 3rd filter apparatus at the higher resistance value of transmitted frequency at receive frequency than the second filter apparatus and being suitable at the higher resistance value of receive frequency.
In certain embodiments, each filter apparatus in first, second, and third filter apparatus comprises the first inductance be connected with the first Capacitance parallel connection to form blocking frequency resonance device.
According to some embodiments, the first inductance can be a part for transformer.In other embodiments, the first inductance comprises separate inductor.
Filter apparatus also can comprise the second inductance of being connected in series to be formed unblock frequency resonance device with blocking frequency resonance device and the second electric capacity at least one of them.
If filter apparatus is low-pass filter device, so filter apparatus can comprise the second electric capacity.If filter apparatus is high-pass filtering apparatus, so filter apparatus can comprise the second inductance.In certain embodiments, filter apparatus not necessarily comprises any one in the second inductance and the second electric capacity, and this will explain after a while.
According to some embodiments, signal transmission and receiving system node can be connected to the first node of the 3rd filter apparatus, the first node of described one or more conveyer node can be connected to the Section Point of the 3rd filter apparatus and the first node of the second filter apparatus, and the Section Point of the second filter apparatus can be connected to the Section Point of the first side of the transformer of transmitted frequency blocking device.
In addition, signal transmission and receiving system node can be connected to the first node of the first side of the transformer of transmitted frequency blocking device, first filter apparatus can be connected to the Section Point of the first side of the transformer of transmitted frequency blocking device, and the first node of described one or more receiver node can be connected to the first node of the second side of the transformer of transmitted frequency blocking device.
Transmitted frequency blocking device also can comprise the 4th filter apparatus of the Section Point of the second side of the transformer being connected to transmitted frequency blocking device.Alternatively, the Section Point of the second side of the transformer of transmitted frequency blocking device can be connected to the Section Point of described one or more receiver node.
In certain embodiments, the network of passive block also comprises coupler, and it is connected between the first side of transformer and the second side of transformer, and is suitable for eliminating residual signal at blocking frequency interval.
In certain embodiments, coupler is connected between the first node of the first node of the first side of transformer and the second side of transformer.
In certain embodiments, coupler is connected between the Section Point of the Section Point of the first side of transformer and the second side of transformer.
Coupler can comprise the one or more resistance between the first node of the first node of the first side being connected to transformer and the second side of transformer.Such as, coupler can comprise be connected in series in the first node of the first side of transformer and the second side of transformer via middle point node first node between the first and second resistance.Coupler also can comprise the 3rd electric capacity be connected between middle point node and ground.First and second resistance can or can not mate.In certain embodiments, coupler comprises and to be connected between middle point node and ground the 3rd inductance of (such as, if with the 3rd Capacitance parallel connection existed).3rd electric capacity and the 3rd inductance provide the phase place of the coupling between tuned transformer both sides so that the appropriate possibility eliminating residual signal.
In order to make coupler to eliminate residual signal, the first side of transformer can be suitable for having the phase place contrary with the second side of transformer.
According to some embodiments, transmitted frequency blocking device comprises the first and second transformers.In certain embodiments, the network of passive block comprises independently the first and second transformers.In other embodiments, the network of passive block can comprise single transformer unit, and the first and second transformers are first and second parts of this single transformer unit.
Signal transmission and receiving system node can be connected to the first node of the first side of the first transformer, the first node of described one or more receiver node can be connected to the first node of the second side of the first transformer, and the Section Point of the first side of the first transformer can be connected to the first node of the first side of the second transformer.First filter apparatus can be connected to the Section Point of the first side of the second transformer.The Section Point of the second side of the first transformer can be connected to the 4th filter apparatus, the first node of the second side of the second transformer can be connected to the 5th filter apparatus, and the Section Point of the second side of the second transformer can be connected to the Section Point of described one or more receiver node.
In certain embodiments, be suitable for having at receive frequency can being connected between the first and second nodes of described one or more receiver node than the 6th filter apparatus at the higher resistance value of transmitted frequency.
Second aspect is another transceiver front-end of communication equipment.Communication equipment can be wireless or wire communication facility.
As first aspect, transceiver front-end can to transmit and receiving system Nodes is connected to and is suitable for transmitting signal transmission and the receiving system that the transmission signal with transmitted frequency and reception have the Received signal strength of receive frequency at signal.Transceiver front-end also can be connected at one or more conveyer Nodes the conveyer being suitable for producing transmission signal, and can be connected to the receiver being suitable for processing Received signal strength at one or more receiver node place.
Transceiver front-end comprises and is connected to signal and transmits and the transmitted frequency blocking device of at least one receiver node in receiving system node and receiver node.The blocking frequency interval that transmitted frequency blocking device has and transmitted frequency is associated and the unblock frequency interval be associated with receive frequency, and be suitable for blocking transmit frequency signal signal transmission and passing through between receiving system and receiver.Transmitted frequency can be included in blocking frequency interval, and receive frequency can be included in unblock frequency interval.
Transceiver front-end also comprises and is connected to signal and transmits and the receive frequency blocking device of at least one conveyer node in receiving system node and described conveyer node.The blocking frequency interval that receive frequency blocking device has and receive frequency is associated and the unblock frequency interval be associated with transmitted frequency, and be suitable for barrage reception frequency signal signal transmission and passing through between receiving system and conveyer.Receive frequency can be included in blocking frequency interval, and transmitted frequency can be included in unblock frequency interval.
Receive frequency blocking device comprises network and first filter apparatus of the passive block comprising at least one transformer, and the first filter apparatus is suitable for having than at the higher resistance value of transmitted frequency at receive frequency.
Transmitted frequency blocking device comprises and is suitable for having at receive frequency having than the 3rd filter apparatus at the higher resistance value of receive frequency at transmitted frequency than the second filter apparatus and being suitable at the higher resistance value of transmitted frequency.
In certain embodiments, second aspect can have in addition and is equal to or characteristic of correspondence with any feature in the various features explained for first aspect above.
The third aspect is a kind of transceiver, and it comprises first or the transceiver front-end of second aspect, conveyer and receiver.This transceiver also can comprise signal transmission and receiving system.
Fourth aspect is (wireless or wired) communication equipment, and it comprises the transceiver of the third aspect.
According to the 5th aspect, provide a kind of for blocking transmit frequency signal in the signal transmission of communication equipment and the method passed through between receiving system and receiver.
The method comprises structure first filter apparatus, first filter apparatus comprises the first inductance be connected with the first Capacitance parallel connection to form blocking frequency resonance device, and comprise the second inductance of being connected in series to be formed unblock frequency resonance device with blocking frequency resonance device and the second electric capacity at least one of them, wherein the first filter apparatus has than at the higher resistance value of receive frequency at transmitted frequency.
The method also comprises: transmitted by signal and receiving system is connected to the first node of the first side of transformer, receiver is connected to the first node of the second side of transformer, and the first filter apparatus is connected to the Section Point of the first side of transformer.
In certain embodiments, the method also provides barrage reception frequency signal in the signal transmission of communication equipment with between receiving system and conveyer.
In these embodiments, the method comprises structure second filter apparatus, second filter apparatus comprises the 3rd inductance be connected with the 3rd Capacitance parallel connection to form blocking frequency resonance device, and comprise the 4th inductance that is connected in series to be formed unblock frequency resonance device with blocking frequency resonance device and the 4th electric capacity at least one of them, wherein the second filter apparatus has than at the higher resistance value of receive frequency at transmitted frequency.
In these embodiments, the method also comprises structure the 3rd filter apparatus, 3rd filter apparatus comprises the 5th inductance be connected with the 5th Capacitance parallel connection to form blocking frequency resonance device, and comprise the 6th inductance that is connected in series to be formed unblock frequency resonance device with blocking frequency resonance device and the 6th electric capacity at least one of them, wherein the 3rd filter apparatus has than at the higher resistance value of transmitted frequency at receive frequency.
When constructing second and the 3rd filter apparatus, the method can comprise: first node signal transmission and receiving system node being connected to the 3rd filter apparatus, conveyer is connected to the Section Point of the 3rd filter apparatus and the first node of the second filter apparatus, and the Section Point of the second filter apparatus is connected to the Section Point of the first side of transformer.
In certain embodiments, the 3rd, the 4th and the 5th aspect can have in addition and is equal to or characteristic of correspondence with any feature in the various features explained for first and/or second aspect above.
An advantage of some embodiments is, provides as the isolation between conveyer and receiver realizes the possibility of integrated form solution.
Another advantage of some embodiments is, avoids the power loss because dummy load causes.
Another advantage of some embodiments is, avoids mating of dummy load and antenna impedance.
Another advantage of some embodiments is, without the need to following the tracks of the antenna impedance of change.
Some embodiments are that the isolation between conveyer and receiver provides simply and the solution of tool area benefit (such as, a transformer and more than three or three filter apparatus).In addition, while there is low-power consumption, isolation is provided according to the solution of some embodiments.
The isolation solution that some embodiments provide is easy to tuning owing to having variable filter means.In certain embodiments, tuning is realized by the variable capacitor of filter apparatus.
Accompanying drawing explanation
Read the following detailed description to embodiment with reference to accompanying drawing, other objects, features and advantages will become apparent, in figure:
Fig. 1 is the schematic diagram that prior art transceiver devices is shown;
Fig. 2 is the schematic diagram of the example transceiver device illustrated according to some embodiments;
Fig. 3 a and 3b is the schematic diagram of two different examples of the filter apparatus illustrated according to some embodiments;
Fig. 4 is the schematic diagram of the example transmitted frequency blocking device illustrated according to some embodiments;
Fig. 5 is the schematic diagram of the example transceiver device illustrated according to some embodiments;
Fig. 6 is the schematic diagram of the example transceiver device illustrated according to some embodiments;
Fig. 7 is the schematic diagram of the example coupler illustrated according to some embodiments; And
Fig. 8 is the flow chart of the exemplary method step illustrated according to some embodiments.
Embodiment
Hereinafter, will describe the embodiment providing transceiver configuration, transceiver configuration comprises receiver, conveyer, signal transmission and receiving system (such as, antenna), transmitted frequency blocking device and receive frequency blocking device.
Conveyer can be connected to signal via receive frequency blocking device and transmit and receiving system node, and receiver can be connected to signal transmission and receiving system node via transmitted frequency blocking device.
Transmitted frequency blocking device is suitable for blocking transmit frequency signal signal transmission and passing through between receiving system and receiver.
The obstruction of transmit frequency signal can realize by having and blocking frequency interval that transmitted frequency is associated and the transmitted frequency blocking device of unblock frequency interval that is associated with receive frequency.Blocking frequency interval can be the frequency interval comprising transmitted frequency, but not blocking frequency interval can be the frequency interval comprising receive frequency.Frequency interval can be such as broadband or arrowband.Frequency interval such as can comprise all frequencies lower than cut-off frequency or the interested all frequencies higher than cut-off frequency.Usually, one of frequency interval is low frequency interval, and another frequency interval is high frequency interval.
Similarly, receive frequency blocking device is suitable for barrage reception frequency signal signal transmission and passing through between receiving system and conveyer.
The obstruction of receiving frequency signals can realize by having and blocking frequency interval that receive frequency is associated and the receive frequency blocking device of unblock frequency interval that is associated with transmitted frequency.Blocking frequency interval can be the frequency interval comprising receive frequency, but not blocking frequency interval can be the frequency interval comprising transmitted frequency.Frequency interval can be such as broadband or arrowband.Frequency interval such as can comprise all frequencies lower than cut-off frequency or the interested all frequencies higher than cut-off frequency.Usually, one of frequency interval (contrary with the transmitted frequency selection of blocking) is low frequency interval, and another frequency interval is high frequency interval.
Embodiment described herein provides isolator/duplexer between conveyer and receiver.Isolator comprises transmitted frequency blocking device and receive frequency blocking device.
For some embodiments introduced herein, one of blocking device is included at least one transformer that earth terminal has one or more filter apparatus.Transformer can have or can not have elimination path between armature winding and secondary winding.This device for transformer can make the signal of certain frequency by (wherein filter apparatus is low ohm), and weakens the signal (wherein filter apparatus is high ohm) of another frequency.
In the exemplary implementation, transmitted frequency blocking device has the described structure with transformer and one or more filter apparatus, and receive frequency blocking device comprises two filter apparatus.
Therefore, blocking device comprises one or more filter apparatus.Filter apparatus be configured with respectively be associated with receive frequency or transmitted frequency by (unblock) frequency range and blocking frequency scope.Each filter apparatus is low-pass filter device or high-pass filtering apparatus normally, and wherein corresponding cut-off frequency has the value between receive frequency and transmitted frequency.
In illustrational typical case realizes above, the filter apparatus of transmitted frequency blocking device can have the blocking frequency interval comprising transmitted frequency and the unblock frequency interval comprising receive frequency.One of these two filter apparatus of receive frequency blocking device can be connected to the filter apparatus between conveyer node and antenna node, and it has the blocking frequency interval comprising receive frequency and the unblock frequency interval comprising transmitted frequency.Another filter apparatus in these two filter apparatus can be connected to conveyer node and transmitted frequency blocking device transformer between filter apparatus, it has the blocking frequency interval comprising transmitted frequency and the unblock frequency interval comprising receive frequency.
Filter apparatus (and isolator therefore) comes tuning by variable component value.Possibility filter apparatus being tuned to any expected frequency provides the possibility that the integrated form (on chip) with arrowband (high q-factor) filter realizes, and single (or a few) realize may being enough to cover all correlated frequencies.
Realize even if many embodiments are herein particularly suitable for integrated form, but isolator can partly or entirely realize outward (such as, utilizing discrete component) at chip equivalently.
Fig. 1 illustrates the typical transceiver device according to prior art.Typical transceiver comprises the receiver (RX) 120, conveyer (TX) 130, antenna 110 and the duplexer 140 that realize as standalone module.Duplexer provides isolation between conveyer and receiver.As previously mentioned, this duplexer realization is usually expensive and large-scale.
Fig. 2 illustrates the example of the alternative transceiver devices according to some embodiments.The transceiver devices of Fig. 2 comprises receiver (RX) 220, conveyer (TX) 230, antenna 210 and transceiver front-end 200.Antenna is connected to the antenna node 211 of transceiver front-end, and conveyer is connected to the conveyer node 214 of transceiver front-end, and receiver is connected to the receiver node 212 of transceiver front-end.In certain embodiments, conveyer and/or receiver can be connected to two nodes (that is, differential receiver input and/or difference conveyer export) of transceiver front-end.
Transceiver front-end 200 comprises transmitted frequency blocking device and receive frequency blocking device.
Transmitted frequency blocking device comprises the network 225 of the passive block comprising at least one transformer 221.In this example, the network of passive block can only be made up of transformer 221, or can by transformer 221 and be connected to transformer the first and second sides first node between coupler (CPL) 224 form.First and second sides of transformer can have opposite phase as shown in Figure 2, or they can have same phase.In other example, more multicompartment can be there is.
The function of coupler 224 eliminates the residual signal of undesired frequency (that is, not having due to such as tuning problem the signal that filtered apparatus is eliminated completely).After a while composition graphs 7 is further described coupler 224.
Transmitted frequency blocking device also comprise be suitable for transmitted frequency block interval (such as, comprise the frequency interval of transmitted frequency) in there is at least one filter apparatus (FA than resistance value higher in receive frequency unblock interval (such as, comprising the frequency interval of receive frequency)
rX) 222,223.If receive frequency is lower than transmitted frequency, so filter apparatus (FA
rX) 222,223 can be low-pass filter device, otherwise they can be high-pass filtering apparatuses.
Receive frequency blocking device comprises at least two filter apparatus (FA
rX, FA
tX) 232,233.Filter apparatus 233 is suitable for blocking in interval (such as, comprising the frequency interval of receive frequency) at receive frequency having than resistance value higher in transmitted frequency unblock interval (such as, comprising the frequency interval of transmitted frequency).Filter apparatus 232 is suitable for blocking in interval (such as, comprising the frequency interval of transmitted frequency) at transmitted frequency having than resistance value higher in receive frequency unblock interval (such as, comprising the frequency interval of receive frequency).If receive frequency is lower than transmitted frequency, so filter apparatus (FA
tX) 233 can be high-pass filtering apparatus, otherwise it can be low-pass filter device.If receive frequency is lower than transmitted frequency, so filter apparatus (FA
rX) 232 can be low-pass filter device, otherwise it can be high-pass filtering apparatus.
Usually, high impedance value can comprise the value being greater than antenna impedance.
Signal transmission and receiving system node 211 are connected to the first node of the first node of the first side of the transformer 221 of transmitted frequency blocking device and the filter apparatus 233 of receive frequency blocking device.
Filter apparatus 222 is connected to the Section Point of the first side of transformer 221, and filter apparatus 223 is connected to the Section Point of the second side of transformer 221.It is one or more that various realization can adopt in FA 222,223.In example as shown in Figure 2, the FA 223 being connected to the Section Point of the second side of corresponding transformer can be designed to be equal to the FA 222 of the Section Point of the first side being connected to transformer.Alternatively, can carry out them different tuning to compensate the defect in such as transformer.
Conveyer node 214 is connected to the Section Point of the filter apparatus 233 of receive frequency blocking device, and receiver node 212 is connected to the first node of the second side of the transformer of transmitted frequency blocking device.
Conveyer node 214 is also connected to the Section Point of the filter apparatus 232 of receive frequency blocking device.The first node of the filter apparatus 232 of receive frequency blocking device is connected to the Section Point of the first side of the transformer 221 of transmitted frequency blocking device.
Filter apparatus (FA
rX) 222,223 and 232 there is identical type (such as, can be structure as depicted in fig. 3 a or the structure described by Fig. 3 b) usually.As mentioned above, filter apparatus 222 is usual close to identical with 223.
The resistance value of filter apparatus 232 can be different from filter apparatus 222 and 223.The class of impedance (and/or in the fabrication process) can carry out convergent-divergent when designing transceiver, with the common mode near the first side making transmit frequency signal and appear to transformer from the receive frequency noise of conveyer.Such as, the class of impedance can be set to realize identical amplitude and phase place on the both sides of transformer.Usually, transmitted frequency transformer coupled is poor due to the existence of 232.Remaining undesired transmission signal can be eliminated by the resistance value of tuning 222 and 232.For receiving frequency signals, similar impedance setting can be carried out.
As previously mentioned, receiver can have differential configuration.Then, the second receiver node is connected to the Section Point of the second side of the transformer of transmitted frequency blocking device.In this embodiment, filter apparatus 223 is optional.
Fig. 2 illustrates and to realize according to the typical case of the transceiver front-end of some embodiments.In other realizes, receive frequency blocking device can comprise network (comprising at least one transformer) and at least one filter apparatus of passive block, and this at least one filter apparatus is suitable for blocking in interval at receive frequency having than resistance value higher in transmitted frequency unblock interval.Then, transmitted frequency blocking device can comprise at least two filter apparatus, one is suitable for blocking in interval at transmitted frequency to have than resistance value higher in receive frequency unblock interval, and another is suitable for blocking in interval at receive frequency having than resistance value higher in transmitted frequency unblock interval.
Fig. 3 a and 3b illustrates two examples of the filter apparatus according to some embodiments.Fig. 3 a illustrates high-pass filtering apparatus (HP FA) 300a, and Fig. 3 b illustrates low-pass filter device (LP FA) 300b.
In this context, term " high pass filter " comprises wherein filter impedance characteristic to be had peak value at first frequency and has the situation of depression (wherein second frequency is higher than first frequency) at second frequency, and term " low pass filter " comprises wherein filter impedance characteristic and has depression at first frequency and have the situation of peak value (wherein second frequency is higher than first frequency) at second frequency.
In this example, FA 300a comprises connected node 340a, the first inductance 310a and the first electric capacity 320a, and the first inductance 310a and the first electric capacity 320a is connected in parallel to connected node 340a and forms blocking frequency resonance device.FA 300a also comprises the second inductance 330a, and the second inductance 330a connects with shunting means ground connection form unblock (passing through) frequency resonance device with the first electric capacity.FA 300a comprises by frequency range (that is, wherein the impedance of FA is low) frequency being greater than cut-off frequency, and the blocking frequency scope of FA 300a (that is, wherein the impedance of FA is high) comprises the frequency being less than cut-off frequency.Usually, can construct and tuning FA 300a to make cut-off frequency between transmitted frequency and receive frequency.
Example FA 300b comprises connected node 340b, the first inductance 310b and the first electric capacity 320b, and the first inductance 310b and the first electric capacity 320b is connected in parallel to connected node 340b and forms blocking frequency resonance device.FA 300b also comprises the second electric capacity 330b, and the second electric capacity 330b connects with shunting means ground connection form unblock (passing through) frequency resonance device with the first inductance.FA 300b comprises by frequency range (that is, wherein the impedance of FA is low) frequency being less than cut-off frequency, and the blocking frequency scope of FA 300b (that is, wherein the impedance of FA is high) comprises the frequency being greater than cut-off frequency.Usually, can construct and tuning FA 300b to make cut-off frequency between transmitted frequency and receive frequency.
Can such as to select in capacitor 320a, 320b, 330b each has the electric capacity providing the high level of the possibility of certain frequency range (such as, filter bandwidht) filter apparatus being tuned to filter apparatus and an electric capacity with the low value providing possibility filter apparatus being tuned to certain frequency band interested to comprise.Capacitor can comprise the group of the more small capacitances of the covering of the whole bandwidth providing each frequency band in addition.
Usually can tuning capacitor 320a to form blocking frequency resonance device with inductance 310a and to form unblock frequency resonance device with inductance 330a.Usually can tuning capacitor 320b to form blocking frequency resonance device with inductance 310b, and usually can tuning capacitance 330b to form unblock frequency resonance device with inductance 310b.
Filter apparatus can such as realize on chip, and high Q substrate realizes, or realizes as the discrete component on printed circuit board (PCB) (PCB).
Any filter apparatus shown in Fig. 3 a and 3b is all suitable as the filter apparatus 222 and 223 of such as Fig. 2.If replace the ground nodes of Fig. 3 a and 3b with the second connected node, so the filter apparatus shown in Fig. 3 a and 3b also can be used as the filter apparatus 232 and 233 of Fig. 2.
Turn back to Fig. 2, suppose that receive frequency is greater than transmitted frequency, so can to FA
rX222,223 and 232 HP FA structure (such as, 300a) is used, and can to FA
tX233 use LP FA structure (such as, 300b).
At transmitted frequency, FA
rX222 and 223 have high impedance.Therefore, do not have (or only having very limited) transmitted frequency electric current will flow through in transformer 221, and receiver is revealed with the transmission signal from conveyer and/or antenna and is isolated.In addition, FA
rX232 also have high impedance with that path preventing transmit frequency signal from taking from conveyer, and FA
tX232 have Low ESR to provide the path from conveyer to antenna for transmit frequency signal.
But at receive frequency, FA
rX222 and 223 have Low ESR.Therefore, receive frequency electric current freely will flow through in transformer 221, and Received signal strength is transformed to receiver from antenna.In addition, FA
rX232 also have Low ESR receive frequency noise is guided to ground from conveyer via 232 and 222, and not by transformer 221(and therefore can not by noise transfer to receiver).FA
tX233 have high impedance to sky line concealing receiving frequency signals to be leaked to conveyer.Similarly, the receive frequency interference generated by conveyer can not arrive antenna.
Observe circuit from antenna node 211, on conveyer side, the impedance of transmitted frequency is low, and transmit frequency signal is directed to antenna from conveyer.On the other hand, observe circuit from antenna node 211, on receiver-side, the impedance of receive frequency is low, and receiver transformer 221 by receiving frequency signals from antenna-coupled to receiver.
In certain embodiments, the second inductance 330a of the filter apparatus in Fig. 3 a can remove.Such as, if two similar filter apparatus are arranged in the respective sides of transformer, and there is at least one little coupling between their the first inductance, so the second inductance can omit.
In certain embodiments, first inductance 310a, 310b of the filter apparatus in Fig. 3 a and 3b can be utilized Transformer Winding by (partly or entirely) or be realized by the part making the coupling (mutual inductance) between the first inductance of filter apparatus comprise transformer.The latter is the alternate ways realizing coupler function.
Fig. 4 illustrates according to this example of some embodiments in transmitted frequency blocking device.The device of Fig. 4 comprises receiver (RX) 420, antenna 410 and transmitted frequency blocking device.
Transmitted frequency blocking device comprises the transformer with Part I 421a and Part II 421b.First and second parts can realize as single transformer, or Part II can comprise two separate inductors of experience coupling (mutual inductance).First and second sides of transformer can have opposite phase as shown in Figure 4, or they can have same phase.
Signal transmission and receiving system 410 are connected to the first node of first side of the Part I 421a of transformer.Receiver 420 is connected to the first node of second side of the Part I 421a of transformer.The Section Point of the Part I 421a of transformer is connected to the corresponding first node of the Part II 421b of transformer.
Transmitted frequency blocking device also comprises two filter apparatus (FA
rX) 422,423, each filter apparatus has similar structures as described in relation with Figure 3b (that is, the 1, the 426 and the 2 425,427 electric capacity and the first inductance).First inductance of filter apparatus is made up of the corresponding windings of the Part II 421b of transformer.
If the coupling of the Part II of transformer should be stronger than the coupling fully eliminated needed for remaining undesired signal, so isolation can be recovered by the opposite direction fine tuning second electric capacity 425,427.
Utilize the FA structure (at where applicable) described by composition graphs 3a, like configurations (that is, utilizing the mutual inductance between the first inductance) is as shown in Figure 4 possible.If in that case, the coupling of the Part II of transformer should be stronger than the coupling fully eliminated needed for remaining undesired signal, so can recover isolation by the opposite direction fine tuning first electric capacity.
Certainly, according to some embodiments, can be same applicable in transmitted frequency blocking device for the structure that the structure described by receive frequency blocking device is similar with composition graphs 4.
Fig. 5 illustrates the example of the alternative transceiver devices according to some embodiments.The transceiver devices of Fig. 5 comprises receiver (RX) 520, conveyer (TX) 530, antenna 510 and transceiver front-end 500.Antenna is connected to the antenna node 511 of transceiver front-end, and conveyer is connected to the conveyer node 514 of transceiver front-end, and namely receiver is connected to the receiver node 512(of transceiver front-end, and receiver has non-differential (single-ended) input).In certain embodiments, receiver can be connected to two nodes (that is, differential receiver input) of transceiver front-end.
Transceiver front-end 500 comprises transmitted frequency blocking device and receive frequency blocking device.
Transmitted frequency blocking device comprises transformer 521.In this example, the network of passive block can only be made up of transformer 521, or can by transformer 521 and be connected to transformer the first and second sides Section Point between coupler (CPL) 524 form.First and second sides of transformer can have opposite phase as shown in Figure 5, or they can have same phase.Coupler can provide the tuning further and/or receive frequency noise to transmitted frequency blocks to reduce.
Transmitted frequency blocking device also comprise be suitable for transmitted frequency block interval (such as, comprise the frequency interval of transmitted frequency) in there are two filter apparatus (FA than resistance value higher in receive frequency unblock interval (such as, comprising the frequency interval of receive frequency)
rX) 522,523.If receive frequency is lower than transmitted frequency, so filter apparatus (FA
rX) 522,523 can be low-pass filter device, otherwise they can be high-pass filtering apparatuses.
Receive frequency blocking device comprises at least two filter apparatus (FA
rX, FA
tX) 532,533.Filter apparatus 533 is suitable for blocking in interval at receive frequency having than resistance value higher in transmitted frequency unblock interval.Filter apparatus 532 is suitable for blocking in interval at transmitted frequency having than resistance value higher in receive frequency unblock interval.If receive frequency is lower than transmitted frequency, so filter apparatus (FA
tX) 533 can be high-pass filtering apparatus, otherwise it can be low-pass filter device.If receive frequency is lower than transmitted frequency, so filter apparatus (FA
rX) 532 can be low-pass filter device, otherwise it can be high-pass filtering apparatus.
Signal transmission and receiving system node 511 are connected to the first node of the first node of the first side of the transformer 521 of transmitted frequency blocking device and the filter apparatus 533 of receive frequency blocking device.
Filter apparatus 522 is connected to the Section Point of the first side of transformer 521, and filter apparatus 523 is connected to the Section Point of the second side of transformer 521.
Conveyer node 514 is connected to the Section Point of the filter apparatus 533 of receive frequency blocking device, and receiver node 512 is connected to the first node of the second side of the transformer of transmitted frequency blocking device.
Conveyer node 514 is also connected to the Section Point of the filter apparatus 532 of receive frequency blocking device.The first node of the filter apparatus 532 of receive frequency blocking device is connected to the Section Point of the first side of the transformer 521 of transmitted frequency blocking device.
Transmitted frequency blocking device can comprise the additional filter device (FA being suitable for having in receive frequency obstruction interval than resistance value higher in transmitted frequency unblock interval alternatively
tX) 525.Filter apparatus 525 can be connected to the first node of the second side of transformer 521.Optional filter apparatus 525 provides the further minimizing of the transmit frequency signal of receiver input.Shortcoming is, by the insertion loss of experience receiving frequency signals.
Fig. 6 illustrates another example of the alternative transceiver devices according to some embodiments.The transceiver devices of Fig. 6 comprises receiver (RX) 620, conveyer (TX) 630, antenna 610 and transceiver front-end 600.Antenna is connected to the antenna node 611 of transceiver front-end, and conveyer is connected to the conveyer node 614 of transceiver front-end, and namely receiver is connected to two receiver nodes 612 of transceiver front-end, 613(, and receiver has Differential Input).
Transceiver front-end 600 comprises transmitted frequency blocking device and receive frequency blocking device.
Transmitted frequency blocking device comprises the first and second transformer 621a and 621b respectively.In this example, the first and second sides of transformer have same phase, and there is not coupler.
Transmitted frequency blocking device also comprise be suitable for transmitted frequency block interval (such as, comprise the frequency interval of transmitted frequency) in there is filter apparatus (FA than resistance value higher in receive frequency unblock interval (such as, comprising the frequency interval of receive frequency)
rX) 622.If receive frequency is lower than transmitted frequency, so filter apparatus 622 can be low-pass filter device, otherwise it can be high-pass filtering apparatus.
Signal transmission and receiving system node 611 are connected to the first node of first side of the first transformer 621a of transmitted frequency blocking device.The Section Point of first side of the first transformer 621a is connected to the first node of first side of the second transformer 621b.Filter apparatus 622 is connected to the Section Point of first side of the second transformer 621b.
Receiver node 612,613 is connected to the Section Point of the first node of the second side of the first transformer and the second side of the second transformer respectively.
Transmitted frequency blocking device also comprises two other filter apparatus (FA being suitable for having in transmitted frequency obstruction interval than resistance value higher in receive frequency unblock interval
rX) 623a, 623b.They are connected to the first node of the Section Point of the second side of the first transformer and the second side of the second transformer respectively.
Alternatively, transmitted frequency blocking device also can comprise and is suitable in transmitted frequency interval, have the filter apparatus (FA than resistance value low in receive frequency interval
tX) 625.Between the Section Point that it can be connected to the first node of the second side of the first transformer and the second side of the second transformer.Optional filter apparatus 625 provides the further minimizing of the transmit frequency signal of receiver input.Shortcoming is, by the insertion loss of experience receiving frequency signals.
Receive frequency blocking device comprises at least two filter apparatus (FA
rX, FA
tX) 632,633.Filter apparatus 633 is suitable for blocking in interval at receive frequency having than resistance value higher in transmitted frequency unblock interval.Filter apparatus 632 is suitable for blocking in interval at transmitted frequency having than resistance value higher in receive frequency unblock interval.If receive frequency is lower than transmitted frequency, so filter apparatus (FA
tX) 633 can be high-pass filtering apparatus, otherwise it can be low-pass filter device.If receive frequency is lower than transmitted frequency, so filter apparatus (FA
rX) 632 can be low-pass filter device, otherwise it can be high-pass filtering apparatus.
Signal transmission and receiving system node 611 are connected to the first node of the filter apparatus 633 of receive frequency blocking device.
Conveyer node 614 is connected to the Section Point of the filter apparatus 633 of receive frequency blocking device.
Conveyer node 614 is also connected to the Section Point of the filter apparatus 632 of receive frequency blocking device.The first node of the filter apparatus 562 of receive frequency blocking device is connected to the Section Point of first side of the second transformer 621b of transmitted frequency blocking device.
Here receive frequency blocking device (vice versa) can be equally applicable to for the structure described by transmitted frequency blocking device.
Fig. 7 illustrates an example implementation (such as, see Fig. 2 and Fig. 5) of coupler.When transformer both sides have opposite phase (that is, signal becomes differential signal on coupler), coupler can be added between the winding of transformer.Such as, coupler can be connected to the first node place of the first node of the first side of transformer and the second side of transformer.In another example, coupler can be connected to the Section Point place of the Section Point of the first side of transformer and the second side of transformer.
The function of coupler eliminates any residual signal of undesired frequency (such as, the transmitted frequency of transmitted frequency blocking device).Therefore, any signal being still present in the undesired frequency on transformer should by feeding back to the opposite side of transformer and following the tracks of by making transformer both sides have opposite phase to carry out and eliminate from the side of transformer by a part for signal.
Usually, the undesired signal of the part be fed between the winding of transformer should equal the undesired signal of a part (that is, amplitude should be mated) of decaying in filter apparatus.Therefore, by increasing these two signal paths (via coupler, by filter apparatus and transformer), undesired signal is eliminated.The optimization of this solution may be subject to the tuning capability of circuit and the restriction of signal bandwidth.
The example coupler (CPL) 700 of Fig. 7 comprises the first and second connected nodes 760,770 and is connected in series in the first and second resistance 710,720 between the first and second connected nodes via middle point node 750.First and second resistance can or can not mate.Coupler 700 also comprises and is connected to electric capacity 730 between middle point node and ground and inductance 740 that is optional and this Capacitance parallel connection.At least one assembly in assembly 710,720,730 and 740 is tunable, to provide the possibility reaching Best Coupling as above.
In certain embodiments, coupler only includes one or more resistance.In certain embodiments, coupler comprises one or more resistance, and only includes in electric capacity 730 and inductance 740; And in other embodiments, coupler comprises one or more resistance, and has both comprised electric capacity 730, comprises again inductance 740.
The undesired signal if filter apparatus is decayed effectively, so the components values of coupler will be greater than 50 ohm (in order to avoid making the degradation of signals of expectation) usually.
As is described in connection with fig. 4, coupler function also can be realized by the mutual inductance between the first inductance of a pair filter apparatus.There is shown in Fig. 4 the structure of this mutual inductance, and it or can not be supplemented by the coupler of the coupler of such as composition graphs 7 description.
Fig. 8 illustrates according to some embodiments for blocking the exemplary method 800 of transmission and receiving frequency signals.The method starts 820,820, constructs the first suitable filter apparatus based on transmission and receive frequency.Structure in 820 has combined such as Fig. 3 a and 3b and has been illustrated above, and it is typically selected to FA and provides the high impedance of transmitted frequency and the Low ESR of receive frequency.830, signal transmission and receiving system (such as, antenna) are connected to the first node of the first side of transformer, and receiver are connected to the first node of the second side of transformer.840, the first filter apparatus is connected to the Section Point of the first side of transformer.
850, construct the second suitable filter apparatus based on transmission and receive frequency.Structure in 850 has combined such as Fig. 3 a and 3b and has been illustrated above, and it is typically selected to FA and provides the high impedance of transmitted frequency and the Low ESR of receive frequency.860, construct the 3rd suitable filter apparatus based on transmission and receive frequency.Structure in 860 has combined such as Fig. 3 a and 3b and has been illustrated above, and it is typically selected to FA and is provided in the high impedance of receive frequency and the Low ESR at transmitted frequency.
870, signal transmission and receiving system are connected to the first node of the 3rd filter apparatus, and conveyer are connected to the Section Point of the 3rd filter apparatus.880, conveyer is connected to the first node of the second filter apparatus, and the Section Point of the transformer of transmitted frequency blocking device is connected to the Section Point of the second filter apparatus.
Other details of the method can be taken passages in transceiver embodiments from above.
Described embodiment and equivalent thereof can realize within hardware.They can by the specialized circuitry of such as application-specific integrated circuit (ASIC) (ASIC), perform by discrete component or by its combination.All these forms expection all will within the scope of the invention.
The present invention can implement in the electronic equipment (such as, wireless or wire communication facility) comprising the circuitry/logic according to any embodiment.Electronic equipment can be such as portable or handheld mobile radio communication equipment, mobile radio terminal, mobile phone, base station, communicator, electronic notebook, smart phone, computer, notebook computer or moving game device.
The present invention is described herein with reference to various embodiment.But, those skilled in the art will recognize that numerous changes of the described embodiment that will fall within the scope of the present invention.Such as, embodiment of the method described herein describes the exemplary method by the method step performed by particular order.But will recognize, when not departing from the scope of the invention, these sequences of events can be undertaken by another order.In addition, certain methods step can executed in parallel, even if they are described as performing in order.
In the same manner, it should be noted that in describing the embodiments of the present, mac function is divided into discrete cell and will limits the present invention anything but.On the contrary, these divide just example.The mac function described as a unit herein can be divided into two or more unit.In the same manner, when not departing from the scope of the invention, can realize as individual unit by the mac function realizing being described as two or more unit herein.
Therefore, should be appreciated that, the restriction of described embodiment just for illustrative purposes, instead of will limit.But scope of the present invention is by enclosing claim instead of limited by this description, and all changes dropped in right all will be encompassed in wherein.
Claims (19)
1. a transceiver front-end for communication equipment, described transceiver front-end:
Can to transmit and receiving system Nodes is connected to and is suitable for transmitting the transmission signal with transmitted frequency and receives the signal transmission and receiving system (210,510,610) with the Received signal strength of receive frequency at signal;
The conveyer (230,530,630) being suitable for producing described transmission signal can be connected at one or more conveyer Nodes; And
The receiver (220,520,620) being suitable for processing described Received signal strength can be connected at one or more receiver node place;
Described transceiver front-end comprises:
Transmitted frequency blocking device, it is connected to described signal and transmits and at least one receiver node in receiving system node and described receiver node, there is and blocking frequency interval that described transmitted frequency is associated and the unblock frequency interval that is associated with described receive frequency, and be suitable for blocking transmit frequency signal described signal transmission and passing through between receiving system and described receiver; And
Receive frequency blocking device, it is connected to described signal and transmits and at least one conveyer node in receiving system node and described conveyer node, there is and blocking frequency interval that described receive frequency is associated and the unblock frequency interval that is associated with described transmitted frequency, and be suitable for barrage reception frequency signal described signal transmission and passing through between receiving system and described conveyer;
Wherein said transmitted frequency blocking device comprises:
Comprise the network of the passive block of at least one transformer (221,521,621a, 621b); And
Be suitable for having than the first filter apparatus (222,522,622) at the higher resistance value of described receive frequency at described transmitted frequency; And
Wherein said receive frequency blocking device comprises:
Be suitable for having than the second filter apparatus (232,532,632) at the higher resistance value of described receive frequency at described transmitted frequency; And
Be suitable for having than the 3rd filter apparatus (233,533,633) at the higher resistance value of described transmitted frequency at described receive frequency.
2. transceiver front-end as claimed in claim 1, each filter apparatus in wherein said first, second, and third filter apparatus includes:
First inductance (310a, 310b, 421b), itself and the first electric capacity (320a, 320b, 424,426) are connected in parallel to form blocking frequency resonance device.
3. transceiver front-end as claimed in claim 2, wherein said filter apparatus also comprises:
Be connected in series with described blocking frequency resonance device so as to be formed second inductance (330a) of unblock frequency resonance device and the second electric capacity (330b, 425,427) at least one of them.
4. the transceiver front-end as described in claim arbitrary in claim 1-3, wherein said signal transmission and receiving system node are connected to the first node of described 3rd filter apparatus, the first node of described one or more conveyer node is connected to the Section Point of described 3rd filter apparatus and the first node of described second filter apparatus, and the Section Point of described second filter apparatus is connected to the Section Point of the first side of the described transformer of described transmitted frequency blocking device.
5. transceiver front-end as claimed in claim 4, wherein said signal transmission and receiving system node are connected to the first node of the first side of the described transformer of described transmitted frequency blocking device, described first filter apparatus is connected to the Section Point of the first side of the described transformer of described transmitted frequency blocking device, and the first node of described one or more receiver node is connected to the first node of the second side of the described transformer of described transmitted frequency blocking device.
6. transceiver front-end as claimed in claim 5, wherein said transmitted frequency blocking device also comprises the 4th filter apparatus (223,523) of the Section Point of the second side of the described transformer being connected to described transmitted frequency blocking device.
7. transceiver front-end as claimed in claim 5, the Section Point of the second side of the described transformer of wherein said transmitted frequency blocking device is connected to the Section Point of described one or more receiver node.
8. the transceiver front-end as described in claim arbitrary in claim 1-7, wherein the described network of passive block also comprises coupler (224,524), it is connected between the first side of described transformer and the second side of described transformer, and is suitable for eliminating the residual signal at described transmitted frequency.
9. transceiver front-end as claimed in claim 8, wherein said coupler comprises:
Be connected to the one or more resistance (710,729) between the first side of described transformer and the second side of described transformer.
10. transceiver front-end as claimed in claim 9, wherein said coupler comprises:
The first and second build-out resistors (710,720) between the first side of described transformer and the second side of described transformer are connected in series in via middle point node (750); And
Be connected to the 3rd electric capacity (730) between described middle point node and ground.
11. transceiver front-end as claimed in claim 9, wherein said coupler also comprises the 3rd inductance (740) with described 3rd Capacitance parallel connection.
12. transceiver front-end as described in claim arbitrary in claim 8-11, the first side of wherein said transformer is suitable for having the phase place contrary with the second side of described transformer.
13. transceiver front-end as claimed in claim 4, wherein:
Described transmitted frequency blocking device comprises first (621a) and second (621b) transformer;
Described signal transmission and receiving system node are connected to the first node of the first side of described first transformer;
The first node of described one or more receiver node is connected to the first node of the second side of described first transformer;
The Section Point of the first side of described first transformer is connected to the first node of the first side of described second transformer;
Described first filter apparatus (622) is connected to the Section Point of the first side of described second transformer;
The Section Point of the second side of described first transformer is connected to the 4th filter apparatus (623a);
The first node of the second side of described second transformer is connected to the 5th filter apparatus (623b); And
The Section Point of the second side of described second transformer is connected to the Section Point of described one or more receiver node.
The transceiver front-end of 14. 1 kinds of communication equipments, described transceiver front-end:
Can to transmit and receiving system Nodes is connected to and is suitable for transmitting signal transmission and the receiving system that the transmission signal with transmitted frequency and reception have the Received signal strength of receive frequency at signal;
The conveyer being suitable for producing described transmission signal can be connected at one or more conveyer Nodes; And
The receiver being suitable for processing described Received signal strength can be connected at one or more receiver node place;
Described transceiver front-end comprises:
Transmitted frequency blocking device, it is connected to described signal and transmits and at least one receiver node in receiving system node and described receiver node, there is and blocking frequency interval that described transmitted frequency is associated and the unblock frequency interval that is associated with described receive frequency, and be suitable for blocking transmit frequency signal described signal transmission and passing through between receiving system and described receiver; And
Receive frequency blocking device, it is connected to described signal and transmits and at least one conveyer node in receiving system node and described conveyer node, there is and blocking frequency interval that described receive frequency is associated and the unblock frequency interval that is associated with described transmitted frequency, and be suitable for barrage reception frequency signal described signal transmission and passing through between receiving system and described conveyer;
Wherein said receive frequency blocking device comprises:
Comprise the network of the passive block of at least one transformer; And
Be suitable for having than the first filter apparatus at the higher resistance value of described transmitted frequency at described receive frequency; And
Wherein said transmitted frequency blocking device comprises:
Be suitable for having than the second filter apparatus at the higher resistance value of described transmitted frequency at described receive frequency; And
Be suitable for having than the 3rd filter apparatus at the higher resistance value of described receive frequency at described transmitted frequency.
15. 1 kinds of transceivers, comprise the transceiver front-end as described in claim arbitrary in claim 1-14, and comprise described conveyer and described receiver.
16. transceivers as claimed in claim 15, also comprise described signal transmission and receiving system.
17. 1 kinds of communication equipments, comprise the transceiver as described in claim arbitrary in claim 15-16.
18. 1 kinds, for blocking transmit frequency signal in the signal transmission of communication equipment and the method passed through between receiving system and receiver, comprising:
Structure (820) first filter apparatus, described first filter apparatus comprises the first inductance be connected with the first Capacitance parallel connection to form blocking frequency resonance device, and comprise the second inductance of being connected in series to be formed unblock frequency resonance device with described blocking frequency resonance device and the second electric capacity at least one of them, wherein said first filter apparatus has than at the higher resistance value of described receive frequency at described transmitted frequency;
Described signal is transmitted and is connected (830) first node to the first side of transformer with receiving system, and described receiver is connected (830) first node to the second side of described transformer; And
Described first filter apparatus is connected (840) Section Point to the first side of described transformer.
19. methods as claimed in claim 18, go back barrage reception frequency signal in the signal transmission of communication equipment and passing through between receiving system and conveyer, described method comprises:
Structure (850) second filter apparatus, described second filter apparatus comprises the 3rd inductance be connected with the 3rd Capacitance parallel connection to form blocking frequency resonance device, and comprise the 4th inductance that is connected in series to be formed unblock frequency resonance device with described blocking frequency resonance device and the 4th electric capacity at least one of them, wherein said second filter apparatus has than at the higher resistance value of described receive frequency at described transmitted frequency;
Structure (860) the 3rd filter apparatus, described 3rd filter apparatus comprises the 5th inductance be connected with the 5th Capacitance parallel connection to form blocking frequency resonance device, and comprise the 6th inductance that is connected in series to be formed unblock frequency resonance device with described blocking frequency resonance device and the 6th electric capacity at least one of them, wherein said 3rd filter apparatus has than at the higher resistance value of described transmitted frequency at described receive frequency;
Described signal is transmitted and is connected (870) first node to described 3rd filter apparatus with receiving system;
Described conveyer is connected (870,880) to the Section Point of described 3rd filter apparatus and the first node of described second filter apparatus; And
The Section Point of described second filter apparatus is connected (880) Section Point to the first side of described transformer.
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| EP (1) | EP2870701B1 (en) |
| CN (1) | CN104604144A (en) |
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| EP2733855B1 (en) | 2012-11-15 | 2016-07-27 | Telefonaktiebolaget LM Ericsson (publ) | Transceiver front-end |
| CN105191156B (en) | 2013-03-14 | 2017-08-08 | 瑞典爱立信有限公司 | Method suitable for the transceiver of frequency duplex communications and for controlling transceiver |
| EP2989724B1 (en) | 2013-04-26 | 2018-08-08 | Telefonaktiebolaget LM Ericsson (publ) | Transceiver arrangement, communication device, method and computer program |
| WO2014177191A1 (en) | 2013-04-30 | 2014-11-06 | Telefonaktiebolaget L M Ericsson (Publ) | Transceiver arrangement, communication device, method and computer program |
| US20150065065A1 (en) * | 2013-09-03 | 2015-03-05 | Broadcom Corporation | Rf transceiver with isolation transformer and methods for use therewith |
| US9900044B2 (en) | 2014-01-21 | 2018-02-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Transceiver arrangement and communication device |
| US10200079B2 (en) | 2014-10-29 | 2019-02-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Transceiver arrangement and communication device |
| US9503155B2 (en) * | 2015-04-09 | 2016-11-22 | Nxp B.V. | Tuning asymmetry of a differential digital interface to cancel magnetic coupling |
| US9882598B2 (en) * | 2015-09-23 | 2018-01-30 | Sunpower Corporation | Communication systems adaptable to power line communications |
| EP3580853B1 (en) * | 2017-02-10 | 2023-04-05 | Telefonaktiebolaget LM Ericsson (publ) | Time division duplex transceiver with an integrated isolator circuit |
| US11823831B2 (en) * | 2019-05-24 | 2023-11-21 | Qualcomm Incorporated | Substrate comprising an inductive coupler for signal leakage reduction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695298A (en) * | 2002-01-09 | 2005-11-09 | 诺基亚有限公司 | Bulk acoustic wave resonator with two piezoelectric layers as balun in filters and duplexers |
| CN101765970A (en) * | 2007-08-23 | 2010-06-30 | 富士通株式会社 | Duplexer, communication module, and communication device |
| US20110299433A1 (en) * | 2010-06-03 | 2011-12-08 | Broadcom Corporation | Rf front-end module |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200625799A (en) * | 2004-12-22 | 2006-07-16 | Airoha Tech Corp | RF front-end structure |
| US20080279262A1 (en) * | 2007-05-07 | 2008-11-13 | Broadcom Corporation | On chip transmit/receive selection |
| US8208865B2 (en) | 2009-09-11 | 2012-06-26 | Broadcom Corporation | RF front-end with on-chip transmitter/receiver isolation and noise-matched LNA |
| US8923167B2 (en) * | 2011-09-27 | 2014-12-30 | Google Technology Holdings LLC | Communication device for simultaneous transmission by multiple transceivers |
-
2012
- 2012-07-09 IN IN39DEN2015 patent/IN2015DN00039A/en unknown
- 2012-07-09 MX MX2015000273A patent/MX2015000273A/en not_active Application Discontinuation
- 2012-07-09 CN CN201280075698.2A patent/CN104604144A/en active Pending
- 2012-07-09 WO PCT/EP2012/063429 patent/WO2014008919A1/en active Application Filing
- 2012-07-09 BR BR112015000358A patent/BR112015000358A2/en not_active IP Right Cessation
- 2012-07-09 EP EP12735274.8A patent/EP2870701B1/en active Active
- 2012-07-09 RU RU2015104054A patent/RU2015104054A/en unknown
- 2012-08-15 US US13/586,480 patent/US8909161B2/en active Active
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695298A (en) * | 2002-01-09 | 2005-11-09 | 诺基亚有限公司 | Bulk acoustic wave resonator with two piezoelectric layers as balun in filters and duplexers |
| CN101765970A (en) * | 2007-08-23 | 2010-06-30 | 富士通株式会社 | Duplexer, communication module, and communication device |
| US20110299433A1 (en) * | 2010-06-03 | 2011-12-08 | Broadcom Corporation | Rf front-end module |
Also Published As
| Publication number | Publication date |
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| BR112015000358A2 (en) | 2017-06-27 |
| IN2015DN00039A (en) | 2015-05-22 |
| TW201409951A (en) | 2014-03-01 |
| US20140011462A1 (en) | 2014-01-09 |
| WO2014008919A1 (en) | 2014-01-16 |
| MX2015000273A (en) | 2015-04-10 |
| EP2870701B1 (en) | 2017-09-06 |
| EP2870701A1 (en) | 2015-05-13 |
| RU2015104054A (en) | 2016-08-27 |
| US8909161B2 (en) | 2014-12-09 |
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Application publication date: 20150506 |